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ComboBox::SelectedIndex Property

Gets or sets the index specifying the currently selected item.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

[BrowsableAttribute(false)]
public:
virtual property int SelectedIndex {
	int get () override;
	void set (int value) override;
}

Property Value

Type: System::Int32
A zero-based index of the currently selected item. A value of negative one (-1) is returned if no item is selected.

ExceptionCondition
ArgumentOutOfRangeException

The specified index is less than or equal to -2.

-or-

The specified index is greater than or equal to the number of items in the combo box.

This property indicates the zero-based index of the currently selected item in the combo box list. Setting a new index raises the SelectedIndexChanged event.

SelectedIndex, SelectedValue, and FormattingEnabled are related as follows:

NoteNote

To deselect the currently selected item, set the SelectedIndex to -1. You cannot set the SelectedIndex of a ComboBox item to -1 if the item is a data-bound item.

The following code example show how to use the FindString method and SelectedIndex property. The example is part of a complete example in the ComboBox class overview.

void findButton_Click( Object^ sender, System::EventArgs^ e )
{
   int index = comboBox1->FindString( textBox2->Text );
   comboBox1->SelectedIndex = index;
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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